JP2009074434A - Pump - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a pump of which the water pressure resistance is increased without increasing the thickness of a separator, and in which the size of a motor is reduced. <P>SOLUTION: This pump with a claw-pole motor as a drive source comprises an impeller 1 for sucking and discharging liquid, a pump case 4 having a suction port 2 and a discharge port 3, a separator 6 pairing up with the pump case to form a pump chamber 5 in which the impeller 1 is rotatably received, a rotor 8 with a magnet 7 for rotatingly driving the impeller 1, and a stator 10 with claw magnetic poles 9 for transmitting a rotating drive force to the rotor 8. The stator 10 is brought into contact with the pairing up 6 which separates the rotor 8 and the stator 10 in a watertight state. Since the stator 10 is brought into contact with the pairing up 6, the water pressure resistance of the pump can be increased by reducing the pressure acting on the pairing up 6 without increasing the thickness of the pairing up 6. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a pump using a claw pole type motor, and more particularly to a technique for improving the water pressure resistance of a pump.

  For example, a pump that sucks and discharges liquid is known that uses a claw pole type motor having claw magnetic poles as a motor that drives an impeller to rotate (see, for example, Patent Document 1). The claw pole type motor has an advantage that the structure is simple and the productivity is good and the manufacturing cost can be kept low.

Usually, the pump is an impeller that sucks and discharges a liquid, a pump case having an inlet and a discharge port, a separation plate that forms a pump chamber that accommodates the impeller rotatably, and forms a pair with the pump case; A rotor having a magnet for rotationally driving the impeller, and a stator having a claw magnetic pole for transmitting rotational driving force to the rotor, and the rotor and the stator separated in a watertight state by the separation plate; It has become.
Special table 2003-505648 gazette

  In the pump chamber that houses the impeller rotatably, the internal pressure is increased by the rotation of the impeller. In order to withstand the pressure in the pump chamber, it is necessary to increase the strength by increasing the thickness of the separation plate that separates the rotor and the stator into a watertight state.

  However, if the thickness of the separation plate is increased, not only the material cost is increased, but also the motor flexibility is increased.

  Accordingly, an object of the present invention is to provide a pump that can increase the water pressure resistance of the pump without increasing the thickness of the separation plate and can reduce the size of the motor.

  In order to solve the above problems, the present invention has a structure in which a stator is brought into contact with a separation plate that separates the rotor and the stator in a watertight state in a pump using a claw pole type motor as a drive source.

  According to the pump of the present invention, by bringing the stator into contact with the separation plate, the pressure in the pump chamber can be received by the stator in contact with the separation plate, and the water pressure resistance of the pump can be increased.

  Further, according to the pump of the present invention, since the pressure in the pump chamber can be received by the stator in contact with the separation plate, the pressure applied to the separation plate is reduced, so that the thickness of the separation plate can be reduced. , Material cost can be reduced.

  Hereinafter, specific embodiments to which the present invention is applied will be described in detail with reference to the drawings.

“First Embodiment”
FIG. 1 is a perspective view of a pump according to the first embodiment, and FIG. 2 is a cross-sectional view taken along line AA of FIG.

  The pump of the first embodiment includes an impeller 1 for sucking and discharging liquid, a pump case 4 having a suction port 2 and a discharge port 3 for sucking and discharging liquid, and a pump chamber 5 for rotatably housing the impeller 1. A separation plate 6 formed in a pair with the pump case 4, a rotor 8 having a magnet 7 for rotationally driving the impeller 1, a stator 10 having claw magnetic poles 9 for transmitting rotational driving force to the rotor 8, A claw pole motor having a control board 11 for controlling a magnetic field generated by the stator 10 is used as a drive source.

  The pump according to the first embodiment has a pump structure in which a claw pole type motor having a so-called outer type rotor structure in which a rotor 8 is arranged on the outer side and a stator 10 is arranged on the inner side with a separating plate 6 as a driving source. ing.

  The pump chamber 5 separates the rotor 8 and the stator 10 into a watertight state in a pump case 4 having a suction port 2 opened in the center of the top surface and a discharge port 3 provided on the side wall (the pump unit and the motor unit are separated from each other). It is formed by joining separation plates 6 to be separated. In addition, a seal member (not shown) is interposed in a joint portion between the pump case 4 and the separation plate 6 in order to partition the pump portion and the motor portion in a watertight state.

  The impeller 1 is rotatably supported via a bearing portion 13 with respect to a fixed shaft 12 provided in the pump chamber 5. The impeller 1 rotates around the fixed shaft 12 to apply centrifugal force to the liquid sucked into the pump chamber 5 from the suction port 2 and discharge the liquid from the discharge port 3 to the outside of the pump. A receiving plate 45 is provided on the upper portion of the bearing portion 13.

  The rotor 8 is formed as a cylindrical body provided integrally with the impeller 1, and a magnet 7 constituting a magnetic circuit (magnetic flux) is provided on the inner wall of the cylindrical portion. A gap (clearance) is secured between the magnet 7 and the separation plate 6 so as not to contact when the rotor 8 rotates.

  The stator 10 is disposed so as to face the inner side of the cylindrical rotor 8 with the separation plate 6 interposed therebetween. The stator 10 has a structure in which an annular coil (winding) 15 is disposed on an iron core having a plurality of claw magnetic poles (claw poles) 9 via an insulating plate 14, and is in surface contact with the separation plate 6. I am letting. Although a clearance is provided between the rotor 8 and the separation plate 6, the stator 10 and the separation plate 6 are brought into contact in a surface contact state without providing a clearance. In the claw pole type stator 10, a magnetic field generated by energizing the annular coil 15 can be efficiently transmitted from the claw magnetic pole 9 to the rotor 8.

  The control plate 11 is provided on the back surface of the stator 10 and controls a magnetic field generated in the annular coil 15 in response to a signal from a position detection unit (not shown).

  In the pump configured as described above, a magnetic field generated by energization of the annular coil 15 is transmitted from the claw magnetic pole 9 to the magnet 7, whereby the magnet 7 is attracted and repelled, so that it is integrated with the rotor 8. The impeller 1 provided in the center rotates about the fixed shaft 12. As the impeller 1 rotates, a pump action is generated, and the liquid is sucked into the pump chamber 5 from the suction port 2, and the liquid pressurized in the pump chamber 5 and pumped in the peripheral direction is discharged. The liquid is discharged from the outlet 3 to the outside of the pump.

  When the impeller 1 rotates, the internal pressure of the pump chamber 5 increases, so that the pressure acts on the separation plate 6. Normally, the thickness of the separation plate 6 is increased in order to secure a pressure resistance that can counteract this pressure, but this increases the size of the motor. However, in this embodiment, since the stator 10 is brought into contact with the separation plate 6 in a surface contact state, the pressure applied to the separation plate 6 can be received by the stator 10 and reduced.

  Thereby, in the pump of this embodiment, the water pressure resistance of the pump can be increased without increasing the thickness of the separation plate 6. In the pump of this embodiment, since the thickness of the separation plate 6 can be reduced, the material cost can be reduced. Furthermore, in this embodiment, since the air gap between the rotor and the motor can be reduced, the pump efficiency is improved, and a pump suitable for downsizing can be provided.

“Second Embodiment”
The pump of 2nd Embodiment is an example which made the contact part of the separation plate 6 and the stator 10 uneven | corrugated shape. Other pump structures are the same as those of the outer rotor structure described in the first embodiment. In the second embodiment, only the parts different from the first embodiment will be described, and the description of the common parts will be omitted.

  FIG. 3 is a cross-sectional view of the pump according to the second embodiment, and FIG.

  In the pump according to the second embodiment, the contact area between the separation plate 6 and the stator 10 is made uneven, thereby increasing the contact area with respect to the pump according to the first embodiment. In the separation plate 6, convex portions 16 </ b> A and concave portions 16 </ b> B are alternately formed at contact portions of both a portion facing the magnet 7 and a portion facing the impeller 1. On the other hand, the stator 10 is alternately formed with convex portions 17A that fit into the concave and convex portions 16B formed on the separation plate 6 and concave portions 17B that fit into the convex portions 16A formed on the separation plate 6. .

  As described above, in the pump of the second embodiment, the contact portion between the separation plate 6 and the stator 10 is in contact with each other in a concavo-convex shape by fitting the convex portions 16A and the concave portions 17B and the concave portions 16B and the convex portions 17A. Therefore, the contact surface area can be increased as compared with the case where the separation plate 6 and the stator 10 are brought into surface contact as in the first embodiment. Therefore, according to the pump of the present embodiment, heat from the liquid can be radiated through the separation plate 6.

“Third Embodiment”
The pump according to the third embodiment is a pump that uses a claw pole type motor having an inner type rotor structure in which a rotor is arranged on the inner side and a stator is arranged on the outer side with a separation plate interposed therebetween. FIG. 5 is a cross-sectional view of the pump of the third embodiment.

  The pump of the third embodiment includes an impeller 21 for sucking and discharging liquid, a pump case 24 having a suction port 22 and a discharge port 23 for sucking and discharging liquid, and a pump chamber 25 for rotatably housing the impeller 21. A separation plate 26 formed in a pair with the pump case 24, a rotor 28 having a magnet 27 for rotationally driving the impeller 21, and claw magnetic poles (not shown) for transmitting rotational driving force to the rotor 28 are provided. The claw pole motor provided with the stator 30 and the control board 31 for controlling the magnetic field generated by the stator 30 is used as a drive source.

  The pump according to the third embodiment has a pump structure using a claw pole type motor having a so-called inner type rotor structure in which a rotor 28 is arranged on the inner side and a stator 30 is arranged on the outer side with a separation plate 26 interposed therebetween. It has become.

  The pump chamber 25 separates the rotor 28 and the stator 30 into a watertight state in a pump case 24 having a suction port 22 opened in the center of the top surface and a discharge port 23 provided on the side wall (the pump unit and the motor unit are separated). It is formed by joining separation plates 26 to be separated. In addition, a seal member 29 is interposed at a joint portion between the pump case 24 and the separation plate 26 in order to partition the pump portion and the motor portion in a watertight state.

  The rotor 28 is formed as a cylindrical body provided integrally with the impeller 21, and a magnet 27 constituting a magnetic circuit (magnetic flux) is provided on the outer wall of the cylindrical portion. The rotor 28 is connected via a bearing portion 35 to a shaft shaft 32 provided on the pump case 24 and a fixed shaft 34 whose ends are inserted and fitted to a shaft support portion 33 provided on the separation plate 26. And is rotatably supported. The fixed shaft 34 is made non-rotatable by rotation stop plates 36 and 37 attached to both ends thereof. A gap (clearance) is secured between the magnet 27 and the separation plate 26 so as not to contact when the rotor 28 rotates.

  Since the impeller 21 is integrated with the rotor 28, the impeller 21 rotates around the fixed shaft 34, applies centrifugal force to the liquid sucked into the pump chamber 25 from the suction port 22, and flows out of the pump from the discharge port 23. And discharge.

  The stator 30 is disposed opposite to the outside of the rotor 28 with the separation plate 26 interposed therebetween. The stator 30 has a structure in which a coil (winding) 38 is disposed on an iron core having a plurality of claw magnetic poles (claw poles) via an insulating plate (not shown). Are in surface contact. Although a clearance is provided between the rotor 28 and the separation plate 26, the stator 30 and the separation plate 26 are brought into contact in a surface contact state without providing a clearance. In the claw pole type stator 30, the magnetic field generated by energizing the coil 38 can be efficiently transmitted from the claw magnetic poles to the rotor 28.

  The control plate 11 is provided on the back surface of the separation plate 26 and controls a magnetic field generated by the coil 38 in response to a signal from the position detection unit 39 that is a position detection sensor. In this pump, the entire portion excluding the pump case 24 is covered with the mold resin 40. That is, the separation plate 26, the stator 30, and the control plate 11 are covered with the mold resin 40.

  In the pump configured as described above, the magnetic field generated by energizing the coil 38 is transmitted from the claw magnetic pole to the magnet 27, and the magnet 27 is attracted and repelled, so that it is integrated with the rotor 28. The impeller 21 thus rotated rotates around the fixed shaft 34. Then, a pump action is generated with the rotation of the impeller 21, and the liquid is sucked into the pump chamber 25 from the suction port 22, and the liquid pressurized in the pump chamber 25 and pumped in the peripheral direction is discharged from the discharge port. 23 is discharged out of the pump.

  When the impeller 21 rotates, the internal pressure of the pump chamber 25 increases, so that the pressure acts on the separation plate 26. In the present embodiment, since the stator 30 is brought into contact with the separation plate 26 in a surface contact state, the pressure applied to the separation plate 26 can be received by the stator 30 and reduced. Thereby, in the pump of this embodiment, the water pressure resistance of the pump can be increased without increasing the thickness of the separation plate 26. Moreover, in the pump of this embodiment, since the thickness of the separation plate 26 can be reduced, the material cost can be reduced. Furthermore, in this embodiment, since the air gap between the rotor and the motor can be reduced, the pump efficiency is improved, and a pump suitable for downsizing can be provided.

“Fourth Embodiment”
The pump of 4th Embodiment is an example which made the contact part of the separation plate 26 and the stator 30 uneven | corrugated shape. The other pump structure is the same as that of the inner rotor structure described in the third embodiment. In the fourth embodiment, only parts different from the third embodiment will be described, and the description of common parts will be omitted.

  FIG. 6 is a cross-sectional view of the pump according to the fourth embodiment, and FIG.

  In the pump of the fourth embodiment, the contact area between the separation plate 26 and the stator 30 is made uneven, thereby increasing the contact area of the pump of the third embodiment. In the separation plate 26, convex portions 41 </ b> A and concave portions 41 </ b> B are alternately formed only at portions facing the stator 30. On the other hand, the stator 30 is alternately formed with convex portions 42A that fit into the concave and convex portions 41B formed on the separation plate 26 and concave portions 42B that fit into the convex portions 41A formed on the separation plate 26.

  As described above, in the pump of the fourth embodiment, the contact portion between the separation plate 26 and the stator 30 has a structure in which the convex portion 41A and the concave portion 42B and the concave portion 41B and the convex portion 42A are brought into contact with each other as a concave and convex shape. Therefore, the contact surface area can be increased as compared with the case where the separation plate 26 and the stator 30 are in surface contact as in the third embodiment. Therefore, according to the pump of this embodiment, heat from the liquid can be radiated through the separation plate 26.

FIG. 1 is a perspective view of a pump according to the first embodiment. 2 is a cross-sectional view taken along line AA in FIG. FIG. 3 is a cross-sectional view of the pump of the second embodiment. 4 is an enlarged cross-sectional view of a main part showing a contact portion between the separation plate and the stator of FIG. FIG. 5 is a cross-sectional view of the pump of the third embodiment. FIG. 6 is a sectional view of the pump of the fourth embodiment. FIG. 7 is an enlarged cross-sectional view of a main part showing a contact portion between the separation plate and the stator of FIG.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1, 21 ... Impeller 2, 22 ... Suction port 3, 23 ... Discharge port 4, 24 ... Pump case 5, 25 ... Pump chamber 6, 26 ... Separation plate 7, 27 ... Magnet 8, 28 ... Rotor 9 ... Claw magnetic pole DESCRIPTION OF SYMBOLS 10, 30 ... Stator 11, 31 ... Control board 15 ... Ring coil 16A, 17A, 41A, 42A ... Convex part 16B, 17B, 41B, 42B ... Concave part 38 ... Coil

Claims (4)

An impeller for sucking and discharging liquid;
A pump case having an inlet and an outlet for sucking and discharging the liquid;
A separating plate that forms a pump chamber that accommodates the impeller rotatably, and forms a pair with the pump case;
A rotor having a magnet for rotationally driving the impeller;
A claw pole type motor having a claw magnetic pole for transmitting a rotational driving force to the rotor, and a pump having a claw pole motor as a drive source,
The pump, wherein the stator is brought into contact with the separation plate that separates the rotor and the stator into a watertight state. The pump according to claim 1,
The pump is characterized in that the contact portion between the separation plate and the stator has an uneven shape. The pump according to claim 1 or 2, wherein
The pump according to claim 1, wherein the claw pole type motor has an outer rotor structure in which a rotor is arranged on the outer side of the separation plate and a stator is arranged on the inner side. The pump according to claim 1 or 2, wherein
The pump according to claim 1, wherein the claw pole type motor has an inner type rotor structure in which a rotor is arranged on the inner side and a stator is arranged on the outer side with the separation plate interposed therebetween.

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